101 lines
2.8 KiB
JavaScript
101 lines
2.8 KiB
JavaScript
/**
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* Handles opening of and synchronization with the reveal.js
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* notes window.
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*/
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var RevealNotes = (function() {
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function openNotes() {
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var jsFileLocation = document.querySelector('script[src$="notes.js"]').src; // this js file path
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jsFileLocation = jsFileLocation.replace(/notes\.js(\?.*)?$/, ''); // the js folder path
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var notesPopup = window.open( jsFileLocation + 'notes.html', 'reveal.js - Notes', 'width=1120,height=850' );
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// Fires when slide is changed
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Reveal.addEventListener( 'slidechanged', function( event ) {
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post('slidechanged');
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} );
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// Fires when a fragment is shown
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Reveal.addEventListener( 'fragmentshown', function( event ) {
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post('fragmentshown');
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} );
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// Fires when a fragment is hidden
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Reveal.addEventListener( 'fragmenthidden', function( event ) {
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post('fragmenthidden');
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} );
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/**
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* Posts the current slide data to the notes window
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*
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* @param {String} eventType Expecting 'slidechanged', 'fragmentshown'
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* or 'fragmenthidden' set in the events above to define the needed
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* slideDate.
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*/
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function post( eventType ) {
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var slideElement = Reveal.getCurrentSlide(),
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messageData;
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if( eventType === 'slidechanged' ) {
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var notes = slideElement.querySelector( 'aside.notes' ),
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indexh = Reveal.getIndices().h,
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indexv = Reveal.getIndices().v,
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nextindexh,
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nextindexv;
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if( slideElement.nextElementSibling && slideElement.parentNode.nodeName == 'SECTION' ) {
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nextindexh = indexh;
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nextindexv = indexv + 1;
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} else {
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nextindexh = indexh + 1;
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nextindexv = 0;
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}
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messageData = {
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notes : notes ? notes.innerHTML : '',
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indexh : indexh,
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indexv : indexv,
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nextindexh : nextindexh,
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nextindexv : nextindexv,
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markdown : notes ? typeof notes.getAttribute( 'data-markdown' ) === 'string' : false
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};
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}
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else if( eventType === 'fragmentshown' ) {
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messageData = {
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fragment : 'next'
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};
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}
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else if( eventType === 'fragmenthidden' ) {
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messageData = {
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fragment : 'prev'
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};
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}
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notesPopup.postMessage( JSON.stringify( messageData ), '*' );
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}
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// Navigate to the current slide when the notes are loaded
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notesPopup.addEventListener( 'load', function( event ) {
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post('slidechanged');
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}, false );
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}
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// If the there's a 'notes' query set, open directly
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if( window.location.search.match( /(\?|\&)notes/gi ) !== null ) {
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openNotes();
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}
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// Open the notes when the 's' key is hit
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document.addEventListener( 'keydown', function( event ) {
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// Disregard the event if the target is editable or a
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// modifier is present
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if ( document.querySelector( ':focus' ) !== null || event.shiftKey || event.altKey || event.ctrlKey || event.metaKey ) return;
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if( event.keyCode === 83 ) {
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event.preventDefault();
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openNotes();
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}
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}, false );
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return { open: openNotes };
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})();
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